Food cooking device



June 23, 1942. R. SARDESON ,2

" FOOD cooxme DEVICE I Filed Aug. 27, 1958 4 Sheets-Sheet 2 m &9

Robrt Sar deson June 23, 1942. R SARDESON 2,287,330

' 'Fobn COOKING DEVICE Filed Aug. 27, 1938 4 Sheets-Sheet 3 We Mw d a 4 s m i t 6 T m M. e n Z. 7. R MIN-7 6 ALIA 00 H M 1/4 1 A /J 54/5. mHF Z 4 7 1 ll 7 I. 11 a 2.? w. I HI MUH H Il NTIII E MJ 8 ml m z w v A. 7 6 7 Z MwAL/L A T (yr v V /0 4.9 2 v 09 mama W Patented June 123, i942 FOOD COOKING DEVICE Robert Sardeson', Minneapolis, Minm, assignor to Harold C. Genter, Miami Beach, Fla.

Application August 27, 1938, Serial No. 227,131

21 Claims.

My invention relates to food cooking devices and particularly to operating mechanisms therefor and has for an object to provide a device which will be positive inaction and which will re lateatcdly produce accurate and identical resu s.

Another object of the invention resides in providing an operating device which will produce exactly the same results regardless of the temperature of the cooking apparatus or the operating mechanism.

Another object of the invention resides in providing an operating mechanism which operates independently of thermostats and other heat controlled devices and in which compensation for variation in the temperature of the apparatus is positively procured. I

A still further object of the invention resides in providing an operating mechanism which is controlled by mechanical devices instead of 20 controlled movable member which, throughout a portion of the movement thereof, is utilized to control a time measuring device and which,

throughout another portion of the movement thereof following the termination of the period measured by said time measuring device, serves to determine the duration of the next following period of time to be measured by said time measuring device.' I

Other objects of the invention reside in the novel combination and arrangement of parts and in the details of construction hereinafter illustrated and/ordescribed. I

While my invention may be used in various 40.

food cooking devices, I have,- for the sake of illustration. disclosed the invention as embodied in a bread toaster.

In the drawings:

Fig. l is an' elevational sectional view of a 45 portion of a toaster-illustrating an embodiment of my invention.

Fig. 2 is an elevational sectional view taken 1 on line'22 of Fig. 1.

Fig. 3 is an elevational sectional view taken- 50 on line 33 of Fig. 2 and showing the parts in normal run down position. V

Fig. 4 is a view similar to Fig. 3 showing the device fully wound up with the handle still depressed.

' rods l8.

Fig. 5 is a view similar to Fig. 4 showing the handle released and the carriage latched.

Fig. 6 is a view similar to Fig. 5 showing the carriage released.

Fig. 7 is a .view similar. to Fig. 5 showing the parts in altered" position.

Fig. 10 is a fragmentary elevational view showing the cam locking device;

Fig. 11 is a fragmentary elevational view taken on the line |I of Figure 1. I

My invention comprises a frame A which is best shown in Figs. 1- and 11. This frame carries, at one portion of the same, a toaster B and at another portion'of the same a timing mechanism C for timing the operation of the toaster.

At the locality of said timing mechanism is provided a clock work D for operating the timing mechanism. These various parts will now be described in' detail.

is supported. Frame A further includes two vertically spaced plates, one of which has been shown and which is designated by the reference numeral l5. These two plates are rigidly at-. tached to one another by means of shouldered These rods are formed with threaded reduced shanks 2| which pass through the said plates and which have screwed upon the ends of them nuts 22. By means of this construction the respective plates are held in proper position and are attached to one another. The assembly of the plates thus formed is secured to the body l2 of base H by means of clip angles 23 which are secured to the said plates and bolted to thebase H by means of bolts 24.

The toaster B may be of any suitable con-'- struction and for this reason the same has not been shown in detail. This toaster utilizes a number of supporting bars 26 which extend across and are attached to the plates l5. These 58. bars 26 support, at spaced intervals, guard wires 'attached to a suitable insulated support I48.

These heating elements may be supported on the body |2 of base II in any suitable manner and likewise are supported at their upper ends through the bars 26. A case 31 encloses the entire toaster and is constructed with suitable openings 38 'in the upper portion of the same through which the bread may be inserted into the toast ovens 3| The case 31 is received within a recess 38 in the base H and is attached thereto in any suitable manner.

The timing device C utilizes a frame 36 which is best shown in Figs. 1 and 2. Frame 36 includes three plates 4|, 42 and 43. The two plates 4| and 42 are heldin spaced relation by means of a number of rods 44 which are constructed at one end with shoulders riveted tothe plate 42; At their other end these rods have reduced portions The bread rack 6| is provided with a bracket 62 which extends through a slot I88 in the end plate I5. This bracket has an ear |8| shown in Fig. 11 which is rigidly secured to a vertically extending supporting bar 63 by means of screws I82. Bar 63 is mounted for vertical translatory movement similar to the bread carriage 56 and in much the same manner. In the plate I is formed another vertically extending slot 64, which has slidably mounted in it two rollers 65 and 66. These rollers rotate upon pintles 61 and 68 which are attached to the bar 63. These pintles are threaded at their ends to receive nuts 68 bymeans of which the pintles may be attached to the bar 53. The bread carriage 56 is constructed with a. bracket II which is clamped under the nut 68 of the pintle 61 whereby the bar 63 and the bread carriage 56 travel in unison. The bracket 62 of bread rack 6| is rigidly attached to the bar 53 so that movement of the carriage 56 causes corresponding movement of the-bread rack 6|. The

45 which are threaded to receive nuts 46. These nuts serve to attach the plate 4| to the rods and to hold the two plates in spaced relation. The plate 43 is somewhat thicker than the plates 4| and 42 for a purpose to be presently more fully described and is held attached to the plate 42 at its upper end by means of a number of rods 41.

Rods 41 are constructed in identically the same manner as the rods 44 and are formed with reduced ends 48, threaded to receive nuts 48, by

means of which the said rods are held attached to the plate 42. The plate 43 has attached to the lower end thereof by means of screws 40 a bar |66 which is in like manner secured to plate 42. This bar serves a purpose to be later described in detail. Frame 36 is mounted on the frame A in the following manner. The two plates 4 j and 42 are constructed at their lower ends with ears 5| which extend through slots 52 in the body l2 of base The upper ends of these plates are similarly constructed with ears 53 which extend into similar notches in a bracket 54 secured to the plate |5 by means of a bolt 55.

. -The toaster B includes a bread carriage 56 whichis slidably mounted for vertical movement along the plate 43. For this purpose the plate is consii'ucted heavier than the plates 4| and 42 and is formed with a vertically extending slot 51. Trav :Zing along this slot are two rollers 58 which are mounted on pintles 58 secured to the carriage 56 and best shown in Fig. 2. The rollers 58 are oi. su ah dimensions as to be snugly received in the slot '51 and guide the carriage 56 for vertical translatory movement.

The heating elements 35 may be energized from any suitable source of electric current which is controlled by means of a switch |46. This switch includes two switch leaves H1 and 8 which are The switch leaf |48 has secured to it a cam |5| which is adapted to be engaged by a projection I52 on the carriage 56. The projection I52 is so designed that, when the carriage 56 is latched in its lowermost position, switch I46 is closed, and when the carriage is released the switch becomes open.

The bread carried in the toaster B is supported on one or more bread racks, there being one bread rack for each toasting oven. In the drawings only one such bread rack has been shown which is indicated by the reference numeral 6|. This bread rack extends horizontally throughout the toasting oven 3| and is provided with suitable holes, not shown, through which the lower ends of the guard wires .34 extend.

to the balance wheel and arbor 84.

bread carriage 56 and the bread racks 6| are normally urged upwardly by means of a tension coil spring "5. This spring is anchored at one end on a pin "6 secured to carriage 56 and at its other end to a bracket |I'I formed on plate 43. The clock work D is best shown in Figs. 2 and 9. For the purpose of energizing the clock work, a spiral spring 12 is utilized which is anchored at one end to the plate 4| and at its other end to an arbor I3. Arbor I3 is joumaled for rotation in bushings 14 set into the plates 4| and 42. This arbor carries a spur gear I5 which meshes with a spur pinion 16 fast on another arbor TI. Arbor I1 is mounted for rotation in bearings drilled in the two plates 4| and 42. A ratchet mechanism 18 acts between the arbor I1 and a spur gear 18 rotatably mounted on said arbor, which mechanism permits of rotating the arbor"|3 to wind the spring 12 and at the same time effects a drive for the gear 18. Inasmuch as such ratchet mechanisms are well known in the art, the construction thereof has not been' shown in detail.

Gear '18 meshes with a spur pinion 8| fast on counter-weighted crank arm 88 which has se- Pivoted on the crank cured to it a crank pin 8|. pin 8| is a link 82 which is also pivoted to a lever 83 which is rotatably mounted on an arbor 84. Arbor 84, similar to the other arbors, is journaled for rotation in bearing-s drilled in two plates 4| and 42. Arbor 84 has secured to it a balance wheel 85. A spring 86 forms a drivingconnection between the lever 83 and the balance wheel 85 whereby movement of the link 82, through rotation of arbor 88, imparts oscillatory movement The spring 86 absorbs the shock created by the link 82 and causes the device to operate more quietly. It will thus be seen that the crank 88, link 82 and the structure operated thereby serves as an escapement for procuring timed movement of the gear train of the clock work D.

The spring; 12 of clock work D- is wound in the following manner: Arbor 13 has an extension 81 which projects outwardly beyond the plate 42. To this extension is rigidly secured. by means of a set screw 88, a spur pinion 88.

This pinion meshes with a rack I'0I, best shown in Figs. 3 to 8 inclusive. The rack IN is held in mesh with the pinion 99 by means of a flanged shown in Figs. 3 to 8 inclusive.

roller I02 which is rotatably mounted on a stud I03 secured to the plate 42. The rack IN is guided for translatory movement by. means of the roller I02 and by means of a channel-shaped guide I04 secured to the plate 42. The guide I04 is constructed with spaced parallel flanges I05 between which a head I06 on the lower end of the rack 'IOI slides. The head I06 fits snugly between the flanges I05 and the rack proper is free from the said flanges so that a minimum amount of friction occurs. The head I06 has secured to it a pin I01 by means of which the rack is given motion to rotate gear 99 and wind the spring 12. When the clock work runs, rack IOI' slowly moves upwardly. For the sake of reference I have' termed such movement as the timed movement of said rack and the downward movement during which the clockwork is being wound as the reverse movement of said rack.

For the purpose of moving rack MI, I have provided a mechanism which I have termed an actuator and which includes the carriage 56. This mechanism is best shown in Fig. 1. Pivoted to the bread carriage 56 by means of a stud I08 is a lever I09. This lever is constructed with a handle III which Projects outwardly through a slot II2 in the case 31. The lever from the ends of the frame 36 when the arm I Surface I21 of cam I26 isv Issuing outwardly from one side of the said arm is a flange I25 which has formed on it a cam I26 which is parallel to the plate 524 butspaced from it. The cam I26 has a cam surface I21. Cam arm I22 may be swung laterally on the stud I23 and the cam surface I21 is so constructed that the same approaches or recedes -I'22 is so swung. adapted to be engaged by a lug I28 which issues outwardly. from the carriage 56. In the winding of the clockwork D, the carriage 56 is depressed and when the lug I28 engages the surface I21 of said cam winding movement of the clockwork is terminated. The carriage 56 is tripped at afixed locality, as will be subsequently more fully cam] For this reason; I have termed i09 is provided with an inwardly turned portion II3 which is constructed witha finger I I4, best Finger H4 is adapted to engage the pin I'01 when the lever I09 is swung inwardly into the position shown in full lines in Fig. 1. Formed in the lever I09 is a slot H5. A headed stud H6 passes through this slot and is secured to the bread carria e 4 56, This stud guides the lever I09 for. swinging movement adjacent the bread carriage 56 and at the same time limits the extreme movement of the said lever. a pin I I8 issuing from the stud I I 6 and to another pin H9, secured to lever I09. This spring urges the lever to its dotted line position shown in A spring H1. is attached to Fig. 1. The lever'l'09 is so designed that, when in its full line position, finger H4 is in a position to engage the pin I01 and when in its dotted line position the said finger will clear the pin to permit the clockwork to unwind without obstruction. It will readilybe comprehended that,

. when the handle III of lever'I09 is depressed,

the same is first swung from its inoperative position to a position in which the finger II4 may engage the pin I01. As further pressure is ap plied to the handle III, bread carriage 58 is moved downwardly and as soon asthe'flnger H4 engages pin I01, rack IOI' is lowered which rotates pinion 99 and winds the spring 12, Such winding is permitted through theratchet mechanism 18, previously referred to. so that it becomes unnecessary to reverse .the movement of described. It will therefore readily become comprehended that the time of toasting is determined by the downward movement of rack IOI which is controlled by the position .of the arm I22 and cam I26 when lug I28 engages said the cam I26 as the time measuring cam.

The arm I22 is formed with an extension I29 which has pivoted to itanother cam arm I3I. This is accomplished bymeans of a bolt I32 which extends jointly through said arms. Arm. I3I is constructed with an oil-set I33 and with an elongated cam I34 which serves to shift the arm I3I and vary the timing of the cam I26.

This cam I have termed the time varying cam.

This cam has a cam surface I35 which is adapted to be engaged by the pin I01 on rack IOI. By means of a mechanism to be presentlydescribed cam I3I is caused to move in unison with arm I22. The cam surface l35 is so disposed that upward movement ofithe' pin I01 causes cam I34 and likewise the .arm I22 to swing toward the left, as viewed in Figs. 3 to 8. It will be comprehended that, if the toasting operation is commenced before the pin I01 reaches its uppermost position, one such position being shown in Fig. 8, the lug I28 when rack IN is depressed will engage an intermediate P rtion of the cam surface I21 which will be intermediate the two extreme ends of said camsurface. It will also be seen that the degree of toasting can; be varied -by shifting the cam I34 laterally with respect to the arm I22.

The cam I34 travels in unison with the arm I22 but may be shifted manually with respect to said arm I22 to permit of varying thedegree of toasting of the bread. This is accomplished as follows: Pivoted to the arm I3I by means of a bolt I36 is a lever I 31 which is constructed withtoengage a pin I4I fast on arm I22. A headed screw I42 passes through a slot H3 in the lever the majority of. the ears in the said clockwork.

The ratchet mechanism 18 is preferably arranged on arbor 11 instead of arbor 13 so as to procure sufllciently accurate winding of the spring 12 which determines the' length of time that the" toaster will operate, as will be subsequently more fully described.

The timing mechanism C consists of a cam assembly I2I which includes a cam arm I22.

Arm I22 is pivoted by means of a stud I23 to the plate 42. This arm extends generally lengthwise of the frame 36 and has formed on it at its lower end a laterally extending plate I24.

I31 and is secured to the offset portion I33 of arm I3I. This screw guides the lever I31 for movement with reference to arm I3I and also limits the degree of movement of said lever. A

spring "washer I40 encircling the screw I42 pro-- vides friction between the said screw and the arm I 31 thus holding the arm I39 in adjusted position relative to the cam I34. The arm I22 is urged to the right by means'of a loop d spring I44 which bears against the extension I29 of said arm and against the rod" which secures the plate 43 tothe plate 42. The pin I4I forms a stop which limits relative movement of the cam I34 and the arm I22 toward one another. When the finger piece I38 is moved upwardly, cam I34 may be more closely positioned to tho catch I53.

. toaster.

arm I22 than when said finger piece I38 is moved adapted to engage 9. lug I54 formed on a swinging arm I55. Arm I55 is pivoted on a stud I56 which is securedto the plate 42. A spring I51, acting between the arm I55 and the guide I04, urges the arm I55 to swing toward the left and to bring the lug I54 into a position to be engaged by the catch I53. Movement of the arm I55 is limited by engagement of said arm with the guide I04. The arm I55 is provided with a roller I58 which is pivoted to a pintle I59 secured to said arm. This roller is so arranged as to lie in the path of movement of pin I01 on rack IM and when engaged by said pin is moved outwardly an amount sufficient to disengage lug I54 from The arm I55 is of such' length and the roller I58 is so positioned that, when the lug of this handle, the lever I09 is swung from its position shown in dotted lines in Fig. 1 to its full line position in which swinging movement'of said lever is arrested when the stud II6 reaches the end of slot II5. This brings the finger II4 into a position to engage the pin I01. Thereafter, as downward pressure is applied to handle III bread carriage 56 commences to travel downwardly against the action of spring I15. Upon initially moving bread carriage 56 cam I13 is disengaged from roller Ill and the plate I24 becomes locked, holding the cam arm I22 from movement and positioning the cam I26. As soon as finger II4 engagespin I01, the rack IIII travels downwardly and the teeth thereof meshing with the teeth of the pinion: 99 cause the said pinion I54 is disengaged the bread has been completely I toasted. A finger piece I6I is formed on the arm I55 by means of which the same may be manually operated to release the bread carriage prior to the completion of the toasting operation.

In the operation of my invention it becomes necessary to lockthe arm I22 in position, while the clock work D'is'being wound up'and until the amount of winding of said clock work has been determined by lug I28 engaging cam surface I21. For this purpose a locking lever I62 is employed which is best shown in Figs. 2 and 11. This lever is formed with a short lever arm I63 and with a longer lever arm I64 which is bent, as indicated at I60 to cause the larger portion of said arm to lie parallel with the arm I63 and in spaced relation thereto. The lever I62 is pivoted by means of a pin I65 to the bar I66. This bar is slotted, as designated at I61, to receive the arm I63 and the pin I65 is so arranged that the extreme end I68 of the arm I63 lies in close proximity to the plate I24 on cam arm I22. A spring I69 acts between the bar I66 and the arm I64 of lever I62 in a manner to urge the end I68 into engagement with plate 42. In normal position the plate I24 is frictionally held against plate 42 and the arm I22 and cam I26 locked from movement.

For releasing the arm I22, a cam roller I.1I is utilized which is pivoted to a stud I12 secured to the end of the arm I64 of lever I62. This cam roller is adapted'to engage a cam I13, secured to the .bread carriage 56. -Cam I13 has an inclined cam surface I14 which, when engaging the roller I1I, urges the arm I64 outwardly and releases the plate I24. The cam I13 is so situated that, when the bread carriage 56 is at its uppermost position, roller I1I is engaged thereby and the locking device operated to free the plate I24. The operationof the invention is as follows: In Fig. 3 the parts are shown when the clock .work D is run down and when the toaster is out of use and relatively cold. In such position it will be noted that the pin I01 is at its uppermost position and engagesthe uppermost end of the to rotate. This winds up the clock spring 12.

During winding the ratchet mechanism 19 functions to permit of the winding of the said spring without causing operation of 4 the entire gear train. As the bread carriage 56 approaches its lowermost position. catch I53 engages lug I54 and forces arm I55 outwardly. When the said catch passes below the lug, spring I51 urges arm I56 backto normal position. Movement of bread carriage 56 and rack IOI continues until the lug I29 engages a portion of the cam surface I21 of cam I26. This arrests movement of the bread carriage-and rack and the clock work D has now been wound as far as permitted by the said ca'm I26. The relative positions of the parts at this stage of the operation of the invention are shown in Fig. 4. At the same time that the carriage 56 is lowered, projection I52 on said carriage engages the cam- I SI of. switch I46 and closes the said switch. The heating elements 35 are now energized. The'rack. IIII is temporarily held in its lowermost position by the ratchet mechanism 19. Upon release of the handle III, the lever I09 is swung outwardly by the spring H1 and finger H4 is moved out of the path of travel of the pin I;.01. Carriage 56 now raises until the catch I53engages the lug I54 and then comes to rest. The positions of the parts are now as shownin Fig. 5. As soon as pressure on the pin I01 is released, the spring 12 of the clock work D causes the gears of the gear train to rotate and the crank arm 99 causes alternate oscillations of the balance wheel 95. The clock work then operates in the normal manner and spring 12 unwinds at a predetermined rate of speed. As the said spring unwinds, rack IOI slowly raises and pin I 01 travels with it. After the lapse of a length of time suitable for toasting the bread carried by the bread rack 6I, pin I01 engages the cam roller I59 and swings the arm I55 outwardly.

' This disengages lug I54 from catch I53 and the ing the uppermost position cam I13 of bread car.-

riage 56 engages the cam roller HI and swings arm I64 outwardly thereby moving the end I 69 of arm I63 away from plate 42 and freeing the plate I24. Upon being freed spring I44 moves cam surface I35 of the timejvarying cam' I34.

This causes arm I22 to be moved toward theleft and permits lug I29 to engage the toe end of the cam I26 whereby a sufficiently great length of time is procured to toast bread with a cold In initiating operation of the toaster, handle III is pressed downwardly against the action of the spring I15. Upon initial movement the cam assembly I2I in a counter-clockwise direction shifting cam I26 to the right so that the heel end of cam surface I21 is in the path of movement of lug I29. At this time the'pin I 01 is in a position to engage the cam surface I35 of the time varying cam I34. After completion of the toasting operation the clock work D continues to operate andduring its subsequent operja pi I 01 continues to rlse'and during such mov ment swings the cam I34gradually to the jle ftl Concurrently, foam arm I22 moves to the left and.the cam 'Ififi'is gradually shifted so that the toe end of the same is moved toward'the position to be engaged by the lug I28. Upon completion of the first toasting operation, as brought out, the cam I13 engages cam roller Ill and frees the'plate I24. Spring I40 then acts upon cam arm I22 and forces the same to move to its extreme right hand position, as shown in Fig. 6. If, at this time, a second slice of bread is inserted into' the toaster and the handle III again depressed, lug I28 would engage the cam surface I21 of cam I25 somewhere near the heel end thereof and the amount of winding of the clock work D would be considerably less than the amount the clock work was initially wound. A short period of toasting would thereupon be procured when the pin I01 operated cam roller I58 to terminate the toasting period.

In Fig. 7 I have shown the arrangement of the parts after the toaster has been fully wound up, where the same was immediately used upon completionof the first toasting operation. In this figure it will benoted that the cam arm I22 is considerably toward the right as shown in Fig. 5.

' If, however, a certain'amount of timeis allowed to elapse before the second slice.of bread is inserted in the toaster, pin I01 moves upwardly beyond its position shown in Fig. 6 and during such movement shifts the cam assembly I2I toward the left. The cam I34 and the clock work D are so designed that, when the pin I01 reaches the uppermost portion of the cam surface I35, the toaster is sumciently cool so that the same amount of time is required to toast the next following slice of bread as when the toaster has been in disuse for a considerable length of time. If a slice of bread is inserted in the toaster before pin I01 reaches its uppermot position, the cam arm I22 would be in an intermediate position and the lug I28 would engage the cam surface I21 at'a portion of the same intermediate the ends thereof. This cam is designed so that, re-

gardless of the amount of time which elapses following each toasting operation, a suflicient length of time is given in the succeeding toasting operation to properly toast the bread. In Fig. 8 I have shown the pin I01 at an intermediate position and the cam I26 in the corresponding position. It will thus be seen-that properly toasted bread will be procured regardless of the condition of the toaster and regardless of the length of the time intervals between toasting operations.

The advantages of my invention are manifest. By means of the-construction shown, uniformity of brownness of the toast can be procured without the use of thermostatic devices. With my invention there are no delicately operable parts.

to get out of adjustment. My invention is highly practical and highly serviceable in operation.

Changes in the specific form of my invention, as herein disclosed, may-be made within the scope of what is claimed without departing from the spirit of my invention.

Having described my invention, what I claim as new and desire to protect by Letters Patent is:

1. In combination, a movable member, movable in opposite directions, driving means for imparting to said movable member timed movement in one direction, said movable member beany of a number of positions upon termination of its movement in the opposite direction,adjustable means for terminating movement of said movable member in the latter direction and at any of a number of said positions, and movable means moved by said movable member for moving said adjustable means to procure variation in the duration of the period of movement of said movable member in said first mentioned direction.

2. In aperiodically operable food cooking device, heated during cooking and cooling after coo-king, said device being re-usable before complete cooling, a movable member'movable in opposite directions, means for imparting to said movable member timed movement in one direction, means for initiating the cooking period and moving the movable member in the opposite direction, means operable by said movable memher at an intermediate position for terminating I the cooking period, movable means for varying the duration-of the cooking period and means operated by said movable member following the termination of the cooking period for moving said movable means to vary the duration of the cooking period.

3. In a periodically operable food cooking device heated during cooking and cooling after cooking, said device being re-usable before complete cooling, a movable member movable in (EXP.

- tion for terminating the cooking period, and means operated by said movable member following the termination of-the cooking period for adjusting said adjustable means to vary the duration of the following cooking period.

4. In a periodically operable food cooking device, heated during cookingand cooling after cooking, said devicebeing re-usable before complete cooling, a movable member movable in opposite directions, means for imparting to said movable member timed movement in one direction, means for initiating the cooking period and moving the movable member in the opposite direction, means operable by said movable member at an intermediate position for terminating the cooking period, said means for imparting timed movement to the movable member becoming actuated upon termination of movement of.

the movable member at any of a number of posietions, a movable abutment adapted to limit the movement of said-movable member and to vary the duration of thefollowing cookingperiod thereof, and means operated by said movable member after termination of the cookingperiod for moving said abutment.

5. In a periodically operable food cooking de-- vice, heated during cooking and cooling after cooking, said device being re-usable before complete cooling, a movable member movable in opposite directions, means for imparting to said movable member timed movement in one direcing adapted to commence timed movement at tion, means for initiating the cooking Period and moving the movable member in the opposite direction, means operable by said movable member at an intermediate position for terminating the cookingperiod, said means for imparting timed movement to the movable member becoming actuated upontermination of movement of the movable member at any of a number of positions, a movable cam adapted to limit movement of said movable member and to vary the duration of the following cooking period, and a posite directions over a predetermined path, a

restrainable driving member adapted upon release to impart to said movable member timed movement in one direction, said movable member when moved in the opposite direction restraining operation of said driving member, an actuator movable with said movable member for moving the same in said opposite direction and for initiating a cooking period, said actuator upon reversal of movement releasing said driving member, a cam for terminating movement of said movable member, means on said actuator adapted to engage said cam, said cam being movable to vary the-position at which movement of said actuator is terminated, means operated by said movable member when at an intermediate position for terminating the cooking period, means controlled by said movable member during travel over a portion of its path following said position for shifting said cam to determine the subsequentlimit at which movement of said actuator isterminated, and means for locking said cam from movement, said means being operated by -said actuator when at its released position.

"I. In a periodically operable food cooking device, heated during cooking and cooling after cooking, said device being re-usable before com plete cooling, a movable member movable in opposite directions over a predetermined path,a restrainable driving member adapted upon release to impart to said movable member timed movement in one direction, said movable member when moved in the opposite direction restraining operation of said driving member, said movable member upon movement in the reverse direction releasing said driving member at various positions of said movable member, a cam movable to vary the position at which said driving member is released, means operated by said movable member when at an intermediate position for terminating the cooking period, and means controlled by said movable member during travel following said position for shifting said cam to determine theduration of the following cooking period. 5

8 In a periodically operable food cooking device, heated during cooking and cooling after cooking, said device being re-usable before complete cooling, a movable member movable in opposite directions over a predetermined Path, a restrainable driving member adapted upon release to impart to said movable member timed movement in one direction, said movable member when moved in the opposite direction restraining operation of said driving member, said movable member upon movement in the second named direction being capable of releasing said driving member at various positions'of said movable member, a cam movable to vary the position at which said driving member is released, means operated by said movable member when at an intermediate position for terminating the cooking period, a second cam movable with said first camand means movable with said movable melnber and engaging said secondcam for shifting the position of the first cam.

9. In a periodically operable food cooking device, heated during cooking and cooling after cooking, said device being re-usable before complete cooling, a movable member movable in oppo- 'site directions, means for imparting to said movable member timed movement in one direction, means for initiating the cooking period and moving the movable member in the opposite direction, means operable by said movable member at an illtermediate position for terminating the cooking period, a lug movable-with said movable member, a movable cam for engagement with said lug, saidcam limiting the movement of said movable member and determining the duration of the following period of the movable member, and means operated by the movable member after termination of the cooking period for moving the cam.

'10. In a periodically operated food cooking device, heated during cooking and cooling after cooking, said device being re-usable before complete cooling, a reciprocable member movable in opposite directions, means for imparting to said reciprocable member timed movement in one direction, means for initiating the cooking period and moving the reciprocable member in the opposite direction, means operable by said-movable member at an intermediate position thereof for terminating the cooking period, means for varying the duration of the cooking period and means operable by said movable member following the termination of the cooking period for moving said means to vary the duration of the following cooking period.

11. In a periodically operated food cooking device, heated during cooking and cooling after cooking, said device being re-usable before complete cooling, a rack movable in opposite directions, 9. spring energized clockwork having a pinion meshing with said rack, said rack upon movement in one direction winding the clockwork, the degree of winding depending upon the final position of the rack, said clockwork imparting to the rack timed movement in the other direction upon termination of the winding thereof, an actuator for-moving said rack to wind the clockwork and initiate the cooking period, a movable abutment for limiting the movement of said rack in the winding of the clockwork to vary the timed movement of the rack by the clockwork, means operable by said rack at an intermediate position thereof for terminating the cooking period and means operable by said rack-after termination of the cooking period for. moving 'the abutment to vary the duration of the following cooking period.

12. In a periodically operated-food cooking device, heated during cooking and cooling after cooking, said device being re-usable before complete cooling, a rack movable in opposite directions, a spring energized clockwork having a pinion meshing with said rack, said rack upon movement in one direction winding the clockwork, the degree of winding depending upon the final position of the rack, said-clockwork imparting to the rack timed movement in the other direction upon termination of the winding thereof, an actuator for moving said rack to wind the clockwork and'initiate' the cooking period, a pivoted lever, a cam on said lever, means movable with said rack for engaging the cam to limit the movement of the rack in winding the clockwork, means operable by the rack at an intermediate position thereof for terminating the cooking period, a second cam carried by said lever and means movable with said rack for engaging said .second cam after termination of the cooking period to swing the lever. and shift the position of the first cam to vary the degree of windingv of the clockwork for the following cooking period.

13. In a periodically operated food cookingdevice, heated during cooking and cooling after cooking, said device being re-usable before complete cooling, a rack movable in opposite directions, a spring energized clockwork having a pinion meshing with said rack, said rack upon movement in one direction winding the clockwork, the degree of winding depending upon the final position of the rack, said clockwork imparting to the rack timed movement in the other direction upon termination of the winding thereof, an actuator for moving said rack to wind the clockwork and initiate the cooking period, a pivoted lever, a cam on said lever, means movable with said rack' for engaging the cam to limit the movement of the rack in winding the clockwork, means. operable by the rack at an intermediate position thereof for terminating the cooking period, a second cam carried by said lever, means movable with said rack for engaging said second cam after termination of the cooking period to swing the lever and shift the position of the first vary the distance traveled by said movable member during the'following period of said movable member.

16. In'combination, a movable member movable in opposite directions, a restrainable driving member adapted upon release to impart to said movabl member timed movement in one direction, said movable member when moved in the opposite direction restraining operation of said driving member, an actuator movable with said movable member for moving the same in cam to vary the degree of winding of the clockwork for the following cooking period and means for locking the position of said lever during winding movement of said clockwork.

14. In a periodically operated food cooking device, heated during cooking and cooling after cooking, said device being re-usable before complete cooling, a rack movable in opposite directions, a spring energized clockwork having a pinion meshing with said rack, said rack upon movement in one direction winding the clockwork, the degree of winding depending upon the' final position of the rack, said clockwork imparting to the rack timed movement in the other direction upon termination of the winding thereof, an actuator for moving said rack to wind the clockwork and initiate the cooking period, a pivoted lever, a cam on said lever, means movable with said rack for engaging the camto limit the movement of the rack in winding the clockwork,

means operable bythe rack at an intermediate position thereof for terminating the cooking period, an arm pivoted to said lever, a second cam-carried by said arm, manual means for adjusting the position of said arm relative to said lever to alter the relative position of said cams and means movable with said rack for engaging portion of its path for adjusting said means to reverse direction and for initiating a cooking period, said actuator upon reversal of movement releasing said driving mechanism, a cam for terminating movement of said movable member, means on said actuator adapted to engage said cam, said cam being movable to vary the position at which movement of said actuator is terminated, means controlled by said movable member during travel over a portion of itspath following said position, for'shifting said cam to determine the subsequent limit at which movement of said actuator is terminated, and means for locking said cam from movement, said means being operated by said actuator when at itsreleased position.

1'7. In a periodically operated food cooking device, heated during cooking and cooling after cooking, said device being re-usable before complete cooling, a rack movable in opposite directions, a spring energized clockwork having a pinion meshing with said rack, said rack upon movement in one direction winding the clockwork, the degree of winding depending upon the final position of the rack, said clockwork imparting to the.

rack timed movement in the other direction'upon termination of the winding thereof,.an actuator movable from an initial to'a final position, means on said actuator engaging and moving said rack to wind the clockwork and initiate the cooking period, a lever extending generally in the same direction as the direction of movement of the said rack, a cam carried by said lever, a lug on said actuator adapted to engage said cam to terminate movement of said rack when said actuator is moved to wind the clockwork, means carried by said actuator for terminating the cooking period, resilient means for returning said actuator to its initial position, a latch for latching said actuator in its final position, means carried by said rack and engaging said latch for freeing said actuator and terminating the cooking period and means operated by said rack subsequent to disengagement of said latching means for shifting the position of said cam.

18. In a periodically operable food cooking de-'- .vice heated during cooking and cooling after cooking, said device being usable before cooling,

a movable member movable in opposite directions, means for imparting to said movable member timed movement in one direction, an actuator movable from an initial to a final position for moving said movable-member in the opposite direction, said movable member upon actuation initiating a cooking period, a cam for terminating the movement of said movable member in the last named direction a latch for latching said actuator in its final position, means carried by said movable member and engaging the latch .for freeing the actuator and terminating the cooking period and means operated by said movable member subsequent to the disengagement of said latching means for shifting the position of said cam.

19. In a periodically operable food cooking 'decooking, said device being usable befor cooling, a movable member movable in opposite directions, means for imparting to said movable member timed movement in one direction, an actuaterminate movement of said actuator, means carried by said actuator for terminating the cooking period, resilient means'for returning said actuator to its initial position, a latch for latching said actuator in its final position, means carried by said movable member and engaging said latch for freeing said actuator for terminating the cooking period and means operated by said movable member subsequent to disengagement of said latch for shifting the position of said cam.

20. In a periodically operable food cooking device heated during cooking and cooling after cooking, said device being usable before cooling, a movable member movable in opposite directions, means for imparting to said movable member timed movement in one direction, an actuator movable from an initial t a final position, means on said actuator for moving said movable member in the opposite direction, said movable member upon actuation initiating a cooking period, a lever, a cam carried by said lever, a lug period.

vice heated during cooking and cooling after on said actuator adapted to engage said cam to terminate movement of said actuator, means carried by said actuator for terminating the cookingperiod, resilient means for returning said actuator to its initial position, a latch for latching said actuator in its final position, means carried by said movable member and engaging said latch for freeing said actuator for terminating the cooking period, means operated by said movable member subsequent to disengagement of said latch for shifting the position of said cam, a lock for holding said cam from movement and means operated by said actuator for rendering said lock inoperative when the actuator has been released by said latch, said means causing the cam to be locked when the actuator is moved away from initial position.

21. In combination, a single periodically operable time controlled movable member movable through consecutive odd numbered and even numbered periods and resettable after each even numbered period to begin movement through the next odd numbered period and being adapted to control the duration of operation of a device throughout the extent of the odd numbered periods, means for determining the duration of the odd numbered periods, and time varying means controlled by the length of the even numbered periods for adjusting'the first named means to vary the duration of the following odd numbered ROB ERT SARDESON. 

